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Old 04-12-2012, 03:03 PM   #38
Joined: Dec 2010
Location: Calgary, Alberta
Oddometer: 59
A note on increasing the front drive rate.

As mentioned gearing the rear sproket lower will help close the gap and engage the front earlier, my 530 had a 13/9 front and a 16 tcase input, 45T rear for about a 67% underdrive rate, going to the 52 rear sprocket raised it into the 70% range.

Then I tried the 13/10 front countershaft and 15 tcase input and am at about 80% (same length 420 chain), great in the deep snow on studs, but tends to climb out of the rut a bit too early as it hardly takes any rear spin for the front sprags to engage...

I may go back to 13/9 and 16 for summer (offroad) conditions. Put a 49 on for local dual sporting.
10 EXCR530 with Christini AWD, street legal
11 FE570S, dual sport and sumo
15 YZ250FX, woods/race
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